package main

import (
	"fmt"
	"time"
)

func main() {
	for i := 0; i <= 2; i++ {
		go func() {
			for j := 0; j < 10; j++ {
				fmt.Printf("协程 i = %d , j = %d \n", i, j)
			}
		}()
	}
	time.Sleep(time.Second * 2)
}
